Tonight’s TV pick: ‘Bates’ promises wicked season ender

The most welcome surprise of TV’s mid-season has to be “Bates Motel” with its edgy performances, vivid portraits of creepy townsfolk and truly chilling look at the formative years of Norman Bates and his smothering mom.

The drama from “Lost” producer Carlton Cuse comes to what promises to be a memorable season finale at 9 tonight on A&E. (It repeats at 10 p.m.)

How round one of this increasingly creepy hour will end is anyone’s guess. But if the season swansong is anything like the rest of the episodes, it’s guaranteed to be packed with nail-chewing moments and Emmy-worthy performances by Freddie Highmore and Vera Farmiga.